CN101562679B - Scan module and scan device using same - Google Patents
Scan module and scan device using same Download PDFInfo
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- CN101562679B CN101562679B CN2008100362670A CN200810036267A CN101562679B CN 101562679 B CN101562679 B CN 101562679B CN 2008100362670 A CN2008100362670 A CN 2008100362670A CN 200810036267 A CN200810036267 A CN 200810036267A CN 101562679 B CN101562679 B CN 101562679B
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Abstract
The invention relates to a scan module and a scan device using the same. A shell of the scan device is provided with a scan platform used for bearing a file to be scanned. The scan module is arranged in the shell and comprises an LED light source, a reflection subassembly and an optical module, wherein the LED light source is used for transmitting light and faces towards the reflection subassembly; the reflection subassembly is used for reflecting light and projects light reflected by the reflection subassembly to the file to be scanned; the optical module is used for receiving light reflectedfrom the file to be scanned; and the reflection subassembly at least reflects light once before the light transmitted by the LED light source is projected on the file to be scanned.
Description
Technical field
The scanning means that the present invention relates to a kind of scan module and use described scan module, particularly a kind of with the light-emitting diode array as the scan module of light source and use the scanning means of described scan module.
Background technology
No matter scanner on family or office's purposes, all occupies considerable status now.The interior perhaps image that scanner provides the user to scan paper spare, and in the paper spare that scanning is obtained perhaps image show with the form of e-file and store, with the transmission of convenience file and the operations such as modification of image.
With the falt bed scanner is example, generally be that file to be scanned is placed on the transparent scanning platform, and provide irradiate light in file to be scanned by the scan module in the scanner, receive the light that reflects by file to be scanned by optical module then, so as to carrying out scan operation.Be to reduce the power consumption of scanner, and the optical efficiency that improves light source, industry has developed application light-emitting diode array and replace cold cathode fluorescent lamp in recent years, as the scanner of scanner light source.In using the scanner of light-emitting diode array as light source, be a plurality of light-emitting diodes to be arranged be arranged on the circuit board, and towards file emission light to be scanned.
Please refer to Fig. 1, it shows the known end view of light-emitting diode as the scanner of light source that utilize.In the scanner 100, scan module 130 is arranged on the below of scanning platform 111, and scan module 130 comprises LED source 131, bolster 134 and optical module 133.LED source 131 is arranged on the bolster 134, and comprises a plurality of light-emitting diodes, in order to towards the file P emission light E to be scanned that is placed on the scanning platform 111.Yet, because light-emitting diode is the point-like illuminating source, can evenly be subjected to light in order to make file P to be scanned, needs one section light mixing distance between LED source 131 and file P to be scanned, so that the light E of a plurality of light-emitting diodes emission can fully mix, to reach the effect of homogenizing.This kind has enough length because be subject to the light path that must make light E, so that light E homogenizing can significantly increase the distance between scan module 130 and the file P to be scanned by the mode of LED source 131 towards file P emission light E to be scanned.So can't effectively reduce the height of scanner 100 integral body, be difficult to meet on the market now demand for electronic product thinning and miniaturization.In addition, this kind only utilizes increases the mode that light mixing distance is carried out light E homogenizing, still can't effectively make file P to be scanned be subjected to the irradiation of homogenizing light, and then influence the quality of imaging.
Summary of the invention
In view of this, the scanning means that the invention provides a kind of scan module and use described scan module, reflection more than the light of scan module emission carried out once before being projeced into file to be scanned earlier, under the condition of same optical path length, the vertical range between light source and the file to be scanned be can reduce, and then the whole height and the volume of scanning means reduced.
According to an aspect of the present invention, propose a kind of scan module, comprise LED source, reflection subassembly and optical module.LED source is in order to emission light, and towards reflection subassembly.Reflection subassembly is projected to file to be scanned in order to reflection ray again by the reflection subassembly light reflected.Optical module is in order to receive from the light of file reflection to be scanned.Before from the ray cast of LED source emission to file to be scanned, reflection ray is once at least for reflection subassembly.
According to a further aspect in the invention, propose a kind of scanning means, comprise housing and scan module.Housing has scanning platform, in order to carry file to be scanned.Scan module is arranged in the housing, and comprises LED source, reflection subassembly and optical module.LED source is in order to emission light, and towards reflection subassembly.Reflection subassembly is projected to file to be scanned in order to reflection ray again by the reflection subassembly light reflected.Optical module is in order to receive from the light of file reflection to be scanned.Before from the ray cast of LED source emission to file to be scanned, reflection ray is once at least for reflection subassembly.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and in conjunction with appended accompanying drawing, be described in detail below:
Description of drawings
Fig. 1 is the known end view of light-emitting diode as the scanning means of light source that utilize;
Fig. 2 is the schematic diagram according to the scanning means of first embodiment of the invention;
Fig. 3 A is the stereogram of reflecting assembly and LED source among Fig. 2;
Fig. 3 B is the schematic diagram of another execution mode of light homogenize structure among Fig. 3 A;
Fig. 3 C is the schematic diagram of an execution mode again of light homogenize structure among Fig. 3 A;
Fig. 4 is the schematic diagram that includes the scan module of sept;
Fig. 5 is the schematic diagram according to the scan module of second embodiment of the invention;
Fig. 6 is the schematic diagram when reflection subassembly has a concave surface type reflecting surface among Fig. 5; And
Fig. 7 is the schematic diagram when reflection subassembly has two concave surface type reflectings surface among Fig. 5.
Embodiment
In the scanning means according to the embodiment of the invention, scan module mainly comprises LED source, reflection subassembly and optical module.LED source is towards reflection subassembly, in order to launch light towards reflection subassembly.Light is before being projected to file to be scanned, earlier via the reflection subassembly reflection at least once.When having same optical path length according to the scanning means of the embodiment of the invention and known scanning means, the scanning means in the embodiment of the invention can reduce the vertical range between LED source and the file to be scanned, and then reduces the height of scanning means.Below propose first and second embodiment as detailed description of the present invention, this two embodiment main difference part is the configuration mode of LED source and reflection subassembly.Yet this two embodiment only in order to as the example explanation, can't dwindle invention which is intended to be protected.In addition, the diagram among the embodiment is also omitted unnecessary assembly, with clear demonstration technical characterstic of the present invention.First embodiment
Please refer to Fig. 2, its displaying be schematic diagram according to the scanning means of first embodiment of the invention.Scanning means 200 comprises housing 210 and scan module 230.Housing 210 has scanning platform 211, in order to carry file P to be scanned.Scan module 230 is arranged in the housing 210, mainly comprises LED source 231, reflection subassembly 232 and optical module 233.LED source 231 is in order to emission light L, and towards reflection subassembly 232.Reflection subassembly 232 is in order to reflection ray L, and light L is projected to file P to be scanned after reflecting through reflection subassembly 232 again.In the present embodiment, as shown in Figure 2, light L is projected to before the file P to be scanned, and reflection subassembly 232 reflection ray L once.In addition, optical module 233 is in order to the light L of the reflection that receives file P to be scanned.Optical module 233 can comprise the assembly such as speculum, lens and image sensing.
Furthermore, scan module 230 also comprises bolster 234, as shown in Figure 2.LED source 231 and reflection subassembly 232 are arranged on the bolster 234.File P to be scanned is positioned at bolster 234 tops.Bolster 234 has opening 234a, and optical module 233 sees through opening 234a and receives from the light L of file P reflection to be scanned.LED source 231 and reflection subassembly 232 correspondences are arranged at the both sides of opening 234a.Direct of travel according to the light L of present embodiment illustrates, the light L of LED source 231 emissions, and at first the direction with the plane that is parallel to file P to be scanned in fact is projected to reflection subassembly 232; Then, light L through after the primary event, is projected to file P to be scanned by reflection subassembly 232; Then, see through opening 234a via file P light reflected L to be scanned and be projected to optical module 233.Than the light source of traditional scan module with directly towards the mode of file emission light to be scanned, the LED source 231 of present embodiment is the direction emission light L with the plane of parallel file P to be scanned, the distance between LED source 231 and the file P to be scanned can be reduced, thereby the height of scanning means 200 can be reduced.Moreover, by reflection way light L is projected to file P to be scanned, make to have scanning means 200, can keep light L and leave to the optical path length that arrives at the image sensing component in the optical module 233 by LED source 231 than low height with respect to prior art.
Secondly, please refer to Fig. 3 A, its displaying be the stereogram of reflecting assembly and LED source among Fig. 2.In the present embodiment, reflection subassembly 232 has light homogenize structure 242, in order to homogenizing light L, and is formed at the surperficial 232a of reflection subassembly 232 towards LED source 231.In addition on the one hand, LED source 231 for example comprises strip circuit board 241 and a plurality of light-emitting diodes 243, is disposed on the strip circuit board 241 these light-emitting diode 243 array types.In the present embodiment, light homogenize structure 242 can comprise and not reflect or low catoptric arrangement, for example be a plurality of site 242a or other special graph, these sites 242a is higher than corresponding to the density that does not dispose light-emitting diode 243 parts corresponding to the density that disposes light-emitting diode 243 parts.The light L that light-emitting diode 243 that so can point-like is luminous is launched carries out homogenizing, makes file P to be scanned be subjected to the irradiation of uniform light L, so as to improving the quality of imaging.Please refer to Fig. 3 B, its displaying be the schematic diagram of another execution mode of light homogenize structure among Fig. 3 A.Light homogenize structure 242 ' comprises projection 242a ' at least, and the last correspondence of surperficial 232a ' that projection 242a ' is positioned at reflecting assembly 232 ' disposes light-emitting diode 243 parts.In addition, shape and the quantity of extinction projection 242a ', present embodiment seldom limits, but the design of the projection 242a ' of every homogenizing light L all can be applicable to this.Please refer to Fig. 3 C, its displaying be the schematic diagram of an execution mode again of light homogenize structure among Fig. 3 A.Light homogenize structure 242 " comprise a plurality of reflective salient point 242a ", these reflective salient point 242a " correspondence disposes the density of light-emitting diode 243 parts; be higher than the density that disposes light-emitting diode 243 parts corresponding to nothing; in order to light L by strong, concentrate part to scatter to the more weak part of both sides brightness, to reach the consistency of light luminance.Yet for the technical staff of the technical field of the invention, the design of light homogenize structure 242 is not restricted to this as can be known.
In addition, the scan module 230 of present embodiment also comprises the first extinction sheet 235 (1), second extinction sheet 235 (2) and the reflecting piece 236 except that comprising assemblies such as aforementioned LED source 231, reflection subassembly 232, optical module 233 and bolster 234.The first extinction sheet 235 (1) and the second extinction sheet 235 (2) are arranged on the bolster 234, and the first extinction sheet 235 (1) is positioned at the top of LED source 231, and the second extinction sheet 235 (2) is positioned at the top of reflection subassembly 232, as shown in Figure 2.The first extinction sheet 235 (1) and the second extinction sheet 235 (2) are preferably the black material, in order to absorb and to stop the scattered beam of light L through producing after the reflection, avoid the light of scattering to influence quality of scanning.Aforementioned extinction assembly in order to ABSORPTION AND SCATTERING light also can only use the first extinction sheet 235 (1) or the second extinction sheet 235 (2).
Moreover reflecting piece 236 is arranged on the bolster 234, and is positioned at a side of LED source 231, as shown in Figure 2.The reflective surface of reflecting piece 236 is towards LED source 231, in order to reflecting part light L, so as to the function of optically focused is provided.The light L that LED source 231 is provided is projected on the file P to be scanned more efficiently.In the present embodiment, be that being arranged on the bottom surface of bolster 234 with reflecting piece 236 is example; Yet, the position that reflecting piece 236 is provided with is not restricted to this, every reflection subassembly 232 part light L (the part light L that just can't utilize reflection subassembly 232 to reflect towards file P to be scanned) outward that can be projected to is towards LED source 231 reflection persons, all applicable in the present embodiment.
On the other hand, in the scanning means 200 of present embodiment, scan module 230 also can comprise sept.Please refer to Fig. 4, its displaying be the schematic diagram that includes the scan module of sept.Include sept 260 in the scan module 230 ', be arranged between LED source 231 and the bolster 234.Scan module 230 ' can be by the thickness that changes sept 260, adjust between LED source 231 and the bolster 234 apart from d, change the optical path length of light L ' whereby, to satisfy different product demands in 232 of LED source 231 and reflection subassemblies.
Above-mentioned according to first embodiment of the invention scan module 230 and use the scanning means 200 of described scan module, be along the direction emission light L that is parallel to file P to be scanned plane, and light L reflected towards file P to be scanned by reflection subassembly 232.Keeping under the same optical path length condition, can reduce the vertical range between LED source 231 and the file P to be scanned, thereby reducing the height of scanning means 200.In addition, also can improve the utilization ratio of the light L of LED source 231 emissions by first, second extinction sheet 235 (1), 235 (2) and reflecting piece 236 being set on bolster 234, and the quality of image scan.In addition, scan module 230 is to comprise that LED source 231, reflection subassembly 232, optical module 233, bolster 234, the first extinction sheet 235 (1), the second extinction sheet 235 (2), reflecting piece 236 and sept 260 are that example describes in the present embodiment, yet those skilled in the art of the present invention as can be known, the assembly that is comprised in the scan module 230 of present embodiment is not restricted to this, also can comprise other assembly commonly used.
Second embodiment
The scan module of present embodiment with according to the scan module 230 of first embodiment of the invention, difference mainly is the relative configuration relation of LED source and reflection subassembly, and the design of reflection subassembly, all the other something in common are no longer given unnecessary details.In addition, the assembly identical with the scan module of first embodiment in the present embodiment accompanying drawing then continued to use identical assembly label.
Please refer to Fig. 5, its displaying be schematic diagram according to the scan module of second embodiment of the invention.LED source 231 and reflection subassembly 432 are arranged on the bolster 434.In the present embodiment, reflection subassembly 432 is arranged at the below of LED source 231, and the light F that self-luminous diode light-source 231 is launched is to be projeced into reflection subassembly 432 with the direction perpendicular to the plane of file P to be scanned in fact.Reflection subassembly 432 has the first reflecting surface 432a and the second reflecting surface 432b, and the first reflecting surface 432a is adjacent to the second reflecting surface 432b.The light F that self-luminous diode light-source 231 is launched at first through first reflecting surface 432a reflection, then again through second reflecting surface 432b reflection, then just is projected to file P to be scanned, as shown in Figure 5.The scan module 430 of present embodiment, by twice of reflection subassembly 432 reflection ray F, so as to adding the optical path length of light F by LED source 231 image sensing component to the optical module 233, and can reduce the vertical range between scan module 430 and the file P to be scanned, further reduce the height of the scanning means (not shown among Fig. 5) of application scanning module 430.
In the scan module 430 shown in Figure 5, the first reflecting surface 432a of reflection subassembly 432 and the second reflecting surface 432b are example with the reflecting surface of plane formula respectively.Yet in another embodiment, the first reflecting surface 432a and the second reflecting surface 432b can be respectively the concave surface type reflectings surface.Please refer to Fig. 6, its displaying be schematic diagram when reflection subassembly has a concave surface type reflecting surface among Fig. 5.The first reflecting surface 532a of reflection subassembly 532 is the concave surface type reflecting surface, and the second reflecting surface 532b of reflection subassembly 532 is the plane formula reflecting surface.In addition, please refer to Fig. 7, its displaying be schematic diagram when reflection subassembly has two concave surface type reflectings surface among Fig. 5.The first reflecting surface 532a and the second reflecting surface 532b of reflection subassembly 632 are the concave surface type reflecting surface.Reflection subassembly 532 and 632, the light F that utilizes at least one concave surface type reflecting surface LED source that point-like is luminous 231 to be launched, concentrate towards file P projection to be scanned, can dwindle the area that light F is projeced into file P to be scanned, increase the uniformity that light F is projected to file P to be scanned, further improve optical efficiency.
In addition, the scan module 430 of present embodiment also can for example be to comprise extinction sheet 435 at least, is arranged at contiguous LED source 231 or near reflection assembly 432,532 and 632 parts on the bolster 434.Extinction sheet 435 is preferably the black material, in order to absorb and to stop the light F of scattering, avoids the light F of scattering to disturb optical module 233 to receive the light F of the reflection of file P to be scanned, thereby can promote the quality of image scan.
Above-mentioned according to first and second embodiment of the present invention scan module and use the scanning means of described scan module, the light of LED source emission is projected to reflection subassembly earlier, and via the reflection subassembly reflection ray at least once.So not only can keep the optical path length of light, and can reduce the vertical range between scan module and file to be scanned, further reduce the height of scanning means.
In sum, though the present invention with preferred embodiment openly as above, preferred embodiment is not in order to limit the present invention.The technical staff of the technical field of the invention without departing from the spirit and scope of the present invention, can do various distortion and modification.Therefore, protection scope of the present invention is when being as the criterion with the scope that accompanying Claim was defined.
[primary clustering symbol description]
100,200: scanning means
111,211: scanning platform
230,230 ', 430: scan module
131,231: LED source
133,233: optical module
134,234,434: bolster
210: housing
232,232 ', 432,532,632: reflection subassembly
232a: the surface of reflection subassembly
234a, 434a: opening
235 ', 435: the extinction sheet
235a ': extinction sheet opening
235 (1): the first extinction sheet
235 (2): the second extinction sheet
236: reflecting piece
241: the strip circuit board
242,242 ': light homogenize structure
243: light-emitting diode
242a: extinction site
242a ': extinction projection
260: sept
432a, 532a, 632a: first reflecting surface
432b, 532b, 632b: second reflecting surface
D: distance
E, F, L, L ': light
P: file to be scanned
Claims (19)
1. scan module comprises:
LED source is in order to launch a light;
Reflection subassembly, described LED source be towards described reflection subassembly, and described reflection subassembly is in order to reflecting described light, and the described ray cast after the reflection of described reflection subassembly is to file to be scanned;
Optical module is in order to receive from the described light of described file reflection to be scanned;
It is characterized in that before described file to be scanned, described reflection subassembly reflects described light once at least from the described ray cast of described LED source emission; And
Bolster, described LED source and described reflection subassembly are arranged on the described bolster, described bolster and have opening, described LED source and described reflection subassembly correspondence are arranged at the both sides of described opening, and described optical module sees through the described light of described opening reception from described file reflection to be scanned.
2. scan module as claimed in claim 1 is characterized in that, the described light of launching from described LED source is projeced into described reflection subassembly with the direction that is parallel to described file to be scanned plane.
3. scan module as claimed in claim 1 is characterized in that, described scan module also comprises:
The first extinction sheet is arranged on the described bolster, and is positioned at the top of described LED source; And
The second extinction sheet is provided with on the described bolster, and is positioned at the top of described reflection subassembly.
4. scan module as claimed in claim 1 is characterized in that, described scan module also comprises:
Reflecting piece is arranged on the described bolster, and is positioned at a side of described LED source, and the reflective surface of described reflecting piece is towards described LED source, and described reflecting piece is in order to the described light in reflecting part.
5. scan module as claimed in claim 1 is characterized in that, described scan module also comprises:
Sept is arranged between described LED source and the described bolster, in order to adjust the distance between described LED source and the described bolster, to change the optical path length of described light between described LED source and described reflection subassembly.
6. scan module comprises:
LED source is in order to launch a light;
Reflection subassembly, described LED source be towards described reflection subassembly, and described reflection subassembly is in order to reflecting described light, and the described ray cast after the reflection of described reflection subassembly is to file to be scanned; And
Optical module is in order to receive from the described light of described file reflection to be scanned;
It is characterized in that, described reflection subassembly has first reflecting surface and second reflecting surface, described first reflecting surface is in abutting connection with described second reflecting surface, after described first reflecting surface reflection of light elder generation process that described LED source is launched, through described second reflecting surface reflection, just be projeced into described file to be scanned afterwards again.
7. scan module as claimed in claim 6 is characterized in that, the described light of launching from described LED source is to be projeced into described reflection subassembly with the direction perpendicular to described file to be scanned plane.
8. scan module as claimed in claim 6 is characterized in that, described scan module also comprises:
Bolster, described LED source and described reflection subassembly are arranged on the described bolster, and described reflection subassembly is arranged on the below of described LED source.
9. scan module as claimed in claim 8 is characterized in that, described scan module also comprises:
At least one extinction sheet is arranged at and is adjacent to described LED source on the described bolster or is adjacent to described reflection subassembly part.
10. scan module as claimed in claim 6 is characterized in that, described first reflecting surface is a plane formula reflecting surface or towards the concave surface type reflecting surface of described LED source.
11. scan module as claimed in claim 6 is characterized in that, described second reflecting surface is a plane formula reflecting surface or towards the concave surface type reflecting surface of described LED source.
12. scan module as claimed in claim 6 is characterized in that, described first reflecting surface and described second reflecting surface are the concave surface type reflecting surface towards described LED source.
13. scan module as claimed in claim 6 is characterized in that, described reflection subassembly has light homogenize structure, is formed at the surface of described reflection subassembly towards described LED source, in order to the described light of homogenizing.
14. scan module as claimed in claim 13 is characterized in that, described light homogenize structure comprises a plurality of sites.
15. scan module as claimed in claim 14, it is characterized in that, described LED source comprises strip circuit board and a plurality of light-emitting diode, be disposed on the described strip circuit board, more described site is higher than the density that disposes described light-emitting diode part corresponding to nothing corresponding to the density that disposes described light-emitting diode part these light-emitting diode array types.
16. scan module as claimed in claim 13, it is characterized in that, described LED source comprises strip circuit board and a plurality of light-emitting diode, be disposed on the described strip circuit board these light-emitting diode array types, described light homogenize structure comprises projection at least, and described projection is positioned on the described surface corresponding to disposing described light-emitting diode part.
17. scan module as claimed in claim 13 is characterized in that, described light homogenize structure comprises a plurality of reflective salient points.
18. scan module as claimed in claim 17, it is characterized in that, described LED source comprises strip circuit board and a plurality of light-emitting diode, be disposed on the described strip circuit board, more described reflective salient point is higher than corresponding to the density that does not dispose described light-emitting diode part corresponding to the density that disposes described light-emitting diode part these light-emitting diode array types.
19. a scanning means comprises:
Housing has scanning platform, and described scanning platform is in order to carry file to be scanned; And
As each described scan module in the claim 1 to 18, be arranged in the described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100362670A CN101562679B (en) | 2008-04-18 | 2008-04-18 | Scan module and scan device using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100362670A CN101562679B (en) | 2008-04-18 | 2008-04-18 | Scan module and scan device using same |
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| Publication Number | Publication Date |
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| CN101562679A CN101562679A (en) | 2009-10-21 |
| CN101562679B true CN101562679B (en) | 2010-12-08 |
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| CN102143300B (en) * | 2010-01-29 | 2013-03-06 | 致伸科技股份有限公司 | Scanning device |
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